Convert Pounds per Cubic Foot to Pounds per US Gallon
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Engineering
About Density Conversions
Density is mass per unit volume, one of the most used properties in materials science and fluid mechanics. The SI unit is kilograms per cubic metre (kg/m³), and fresh water near 4 °C lands almost exactly at 1000 kg/m³, which equals 1 g/cm³, 1 g/mL, and about 62.428 lb/ft³. That simple coincidence is deliberate: the original gram was defined as the mass of one cubic centimetre of water. Engineers pick units by context: chemistry and laboratory work use g/cm³ or g/mL; process plants and petroleum use kg/m³ or API gravity; US construction uses pounds per cubic foot; and fuel and paint spec sheets often list pounds per gallon. Lead comes in at about 11.34 g/cm³ (708 lb/ft³), aluminium at 2.70 g/cm³ (168 lb/ft³), and structural steel at roughly 7.85 g/cm³ (490 lb/ft³). Our converter uses exact definitions (1 lb = 0.45359237 kg, 1 ft = 0.3048 m), so computed values match reference tables published by NIST and ASTM.
Quick Conversions
| Unit Name | Symbol | Per 1 Pound per Cubic Foot |
|---|---|---|
| Gram per Cubic Centimeter | g/cm³ | 0.0160185 |
| Gram per Milliliter | g/mL | 0.0160185 |
| Kilogram per Cubic Meter | kg/m³ | 16.0185 |
| Kilogram per Liter | kg/L | 0.0160185 |
| Ounce per Cubic Inch | oz/in³ | 0.00925926 |
| Pound per Cubic Foot | lb/ft³ | 1 |
| Pound per Cubic Inch | lb/in³ | 0.000578704 |
| Pound per US Gallon | lb/gal | 0.133681 |
Frequently Asked Questions
How do I convert Pounds per Cubic Foot to Pounds per US Gallon?
To convert Pounds per Cubic Foot to Pounds per US Gallon, use the conversion where 1 Pound per Cubic Foot (lb/ft³) = 0.133681 Pounds per US Gallon (lb/gal). For example, 1 Pound per Cubic Foot = 0.133681 Pounds per US Gallon.
What are common Pound per Cubic Foot to Pound per US Gallon conversions?
Here are common conversions: 1 Pounds per Cubic Foot = 0.133681 Pounds per US Gallon, 5 Pounds per Cubic Foot = 0.668403 Pounds per US Gallon, 10 Pounds per Cubic Foot = 1.33681 Pounds per US Gallon, 25 Pounds per Cubic Foot = 3.34201 Pounds per US Gallon, 50 Pounds per Cubic Foot = 6.68403 Pounds per US Gallon, 100 Pounds per Cubic Foot = 13.3681 Pounds per US Gallon.
When would I need to convert Pounds per Cubic Foot to Pounds per US Gallon?
Converting between these units is common in international trade, scientific research, and everyday situations where different measurement systems are used.
How precise are the conversions?
All conversions use exact factors verified against NIST and ISO standards with up to 10 significant figures of precision. Results are calculated using IEEE 754 double-precision arithmetic, which provides approximately 15-17 significant digits. For temperature and other non-linear conversions, exact formulas are used rather than approximations.